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<title>SED: Simple Equilibrium Diagrams</title>
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    <a href="SP_0_Main.htm"><img src="images/abacus.gif" border="0" width="32" height="32" alt="Calc." title="Calc."></a>&nbsp;</td>
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<h2>SED: Simple Equilibrium Diagrams</h2>

<p>SED is a modified version of the <a href="SP_Haltafall.htm">Haltafall</a>
computer program. SED can generate
<nobr><a href="SP_Diagr_Fract.htm">fraction</a>,</nobr>
<a href="SP_Diagr_Log.htm">logarithmic</a> and
<a href="S_Diagr_SolublAl.htm">solubility</a> diagrams.
Calculated values of <a href="SP_pH.htm">pH</a> and redox potential
<nobr>(<a href="1_Eh_pe.htm">pe</a>)</nobr> can also be plotted.
In these diagrams, the calculated concentrations are plotted as a
function of a <i>master variable</i> (usually pH, redox potential or a
total concentration).</p>

<p>See also: <a href="SP_SED_Input_File_Format.htm">Format of input data-file</a>,
and <a href="SP_Plot-File_Format.htm">output plot-file format</a>.</p>

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